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1、附录语句表外文资料翻译ThefuturedevelopmenttrendofPLCInthefieldofindustrialautomationcontrolisdividedintoPLC,industrialcontrolandembeddedcontrol,andthePLCsince1968afterthebirthatanalarmingrateinthisareahasbecomethedominantserviceprovider,forawiderangeofautomationcontrolequipm
2、enttoprovideaveryreliablecontrolapplications.Themainreasonisthatitisabletocontroltheapplicationofautomationtoprovideasafe,reliableandfairlycompletesolutionsforindustrialenterprisesinthecurrentautomationneeds.1.PLCcharacteristicsandapplication(1)reliabilityTherelia
3、bilityoftheproduct'seffectivenessandmaintainability.Programmablecontrollerandhighreliability,performanceinthefollowingareas:a.doesnotrequirealargenumberofprogrammablelogiccontrollermovingpartsandelectroniccomponents,greatlyreducingwiring,atthesametime,simplein-hou
4、semaintenance,maintenancetime,soreliabilityisimproved.b.thereliabilityofprogrammablelogiccontrollerdesignmethodusingaseriesofdesign,suchasredundantdesign,brown-outprotection,faultdiagnosis,alarmandoperationofinformationdisplayandinformationprotectionandrecovery.c.
5、ProgrammableControllereasestronger,ithasprogrammedasimple,easytooperate,programmingerrorratesubstantiallyreduced,andthepooroperatingenvironmentfortheindustrialdesignofhardwarereliabilitygreatlyincreased・d.programmablelogiccontrollerhardwaredesign,usingaseriesofmea
6、surestoimprovereliability.Forexample,theuseofhigh-reliabilityindustrialgradecomponents,theuseofadvancedelectronicprocessingtechnology(SMT)manufacturing,tointerferewiththeuseofshielding,isolationandfiltering;memorycontentprotection,theuseofwatchdogandself-diagnosti
7、cmeasuresdesignedtofacilitatemaintenanceandsoon.(1)easea.easytooperate:theoperationofthePLCincludingtheproceduretochangetheinputandprocessoperation,themajorityofPLCprogrammertocarryoutproceduresfortheuseofinputandchangetheoperation.ThePLCisnowthemajorityoftheprogr
8、ammercanusethecomputerdirec什％tochangethepresentproceduremayalsoberequiredtoaddressthebasisofnumber,relaynumberorcontactnumber,orsearchdirectlyinordertof
